RoadVitals

2006 BMW 330I Engine Problems

Owner-reported complaints naming the engine system, filed with NHTSA

Data refreshed

Engine reportsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
26
Latest Aug 18, 2025
Share of all reportsThis category as a share of every owner report on file for this model year. One report can name more than one component, so the categories overlap.
12%
of 219 total
Crash or fire reportedReports in this category whose submitter recorded that a crash or a fire occurred. The reporter's own answer on the NHTSA form, not a verified finding.
6
Injuries or deaths reportedTotals the submitters entered on their own reports in this category. Not verified by NHTSA and not a casualty statistic.
0

What this page shows

Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components. Every record below is an owner-reported complaint about the 2006 BMW 330I submitted to NHTSA — not a confirmed defect, not a recall and not a manufacturer bulletin. 26 reports on file name it.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Owner reports naming engine

The 25 most recent of 26, in the owner's own words

Engine
Filed Aug 18, 2025
Fire reported

The contact owns a 2006 BMW 33I. The contact stated that while driving at 75 MPH, the contact noticed smoke coming into the interior of the vehicle. No warning lights were illuminated. In addition, the contact noticed fire coming from underneath the hood. The contact exited the vehicle. The contact stated he had to leave the vehicle abandoned for about a month. The contact stated the vehicle had been towed to an impound lot. The vehicle was then towed to the contact’s residence. The contact stated that a certified independent mechanic diagnosed the failure as thermal damage due to the NHTSA recalls. The vehicle was then towed to the dealer, where it was diagnosed with an oil leak that caused the fire. The contact was informed of a recall NHTSA Campaign Number: 17V683000 (Engine and Engine Cooling) and NHTSA Campaign Number: 19V273000 (Engine and Engine Cooling) however the VIN was not included. The manufacturer was made aware of the failure, and a case was filed. The contact was advised to have the vehicle towed to the dealer for further investigation. The contact stated that the manufacturer initiated an investigation, and after the investigation was performed, the case was closed. The failure mileage was approximately 101,000.

NHTSA ID
11681317
Incident
Dec 18, 2024
Mileage
101,000 mi
Engine
Filed Mar 2, 2023

The contact owns a 2006 BMW 330I. The contact received notification of NHTSA Campaign Number: 22V119000 (Engine and Engine Cooling) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that while driving at an undisclosed speed, a burning odor was detected. The contact parked the vehicle; however, the vehicle failed to restart. Prior to the failure, the dealer was made aware of the issue but confirmed that parts were not yet available and scheduled an appointment for April. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 149,000. Parts distribution disconnect.

NHTSA ID
11509887
Incident
Feb 25, 2023
Mileage
149,000 mi
Engine
Filed Nov 17, 2022

The contact owns a 2006 BMW 330I. The contact received notification of NHTSA Campaign Number: 22V119000 (Engine and Engine Cooling) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that the vehicle was emitting an abnormal oil burning odor. The manufacturer was not made aware of the issue. The failure mileage was unknown. VIN tool confirms parts not available.

NHTSA ID
11493984
Incident
Mar 2, 2022
Engine
Filed Sep 29, 2022

The contact owns a 2006 BMW 330I. The contact received notification of NHTSA Campaign Number: 22V119000 (Engine and Engine Cooling) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

NHTSA ID
11487054
Incident
Sep 29, 2022
Engine
Filed Aug 25, 2022

The contact owns a 2006 BMW 330I. The contact received notification of NHTSA Campaign Number: 22V119000 (Engine and Engine Cooling) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that after turning off the vehicle, she noticed that the engine was extremely hot. The dealer was made aware of the failure and confirmed that parts were not yet available. The vehicle was not diagnosed nor repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 88,000. VIN tool confirms parts not available.

NHTSA ID
11481208
Incident
Mar 2, 2022
Mileage
88,000 mi
ElectricalEngineFuel system
Filed Aug 9, 2022

BMW has issued a recall with no resolution. My engine is making noises from the crankcase and no alternative has been offered at this moment. The dealer does not want to address the issue.

NHTSA ID
11478483
Incident
Aug 9, 2022
Engine
Filed Aug 4, 2022

The contact owns a 2006 BMW 330I. The contact received notification of NHTSA Campaign Number: 22V119000 (Engine and Engine Cooling) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

NHTSA ID
11477666
Incident
Mar 2, 2022
Engine
Filed Apr 28, 2022
Fire reported

The contact owns a 2006 BMW 330i. The contact stated while driving at 45 MPH, the vehicle stalled inadvertently and the engine exploded. The automatic transmission gearbox warning light illuminated. The contact immediately exited the vehicle. The contact stated that there was a significant amount of dark smoke and there was fire underneath the hood of the vehicle. The fire was extinguished independently. The contact did not sustain any injuries. A police report was filed. The vehicle was towed to the contact’s residence. The vehicle was then towed to an independent mechanic where the engine, the valves and the engine compartment were replaced. The vehicle was repaired. The contact later received notification of NHTSA Campaign Number: 22V119000 (Engine And Engine Cooling), which she associated with the failure. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 111,000.

NHTSA ID
11462662
Incident
Apr 2, 2022
Mileage
111,000 mi
Engine
Filed Apr 26, 2022
Fire reported

The contact owned a 2006 BMW 330i. The contact stated while her boyfriend was driving 65 mph, he heard an abnormal noise coming from underneath the vehicle. The contact stated no warning light was illuminated. The driver was able to park on the side of the road and exit before the vehicle was engulfed in flames. The driver saw the fire starting under the transmission. The driver stated no one was injured nor sought medical attention. The driver stated the fire department extinguished the fire. A fire report was filed. The driver stated the police did arrive at the location and filed a police report. The vehicle was not drivable. The insurance company deemed the vehicle a total loss. The contact towed the vehicle to the record yard. A dealer was not contacted. The manufacturer had not been informed of the failure. The contact received notification of NHTSA Campaign Number: 22V119000 ( Engine and Engine Cooling) on 4/25/2022. The failure mileage was approximately 100,000. Consumer stated her vehicle hit a donkey head on but none of the airbags went off.

NHTSA ID
11462176
Incident
Dec 6, 2021
Mileage
100,000 mi
Engine
Filed Apr 24, 2019
Fire reported

MY 2006 BMW 330I CAUGHT FIRE IN MY DRIVEWAY 2.5HRS AFTER BEING DRIVIN. THE CAR DID NOT INDICATE ANY WARNING PRIOR TO THE FIRE.

NHTSA ID
11203444
Incident
Apr 18, 2019
Mileage
180,000 mi
Engine
Filed Mar 19, 2019

LETTER FROM CONSUMER REGARDING PUBLIC SAFETY CONCERN THAT NEEDS TO BE IMMEDIATELY ADDRESSED (RECALL 17-V; POSITIVE CRANKCASE VENTILATION (PCV) VALVE HEATER). *AS

NHTSA ID
11189650
Incident
Feb 1, 2018
ElectricalEngineVisibility
Filed Apr 23, 2018
Fire reported

TL* THE CONTACT OWNS A 2006 BMW 330I. WHEN THE ENGINE WAS STARTED AND THE DEFROSTER WAS ACTIVATED, A POPPING NOISE WAS HEARD UNDER THE HOOD AND AN UNUSUAL ODOR EMITTED FROM THE VENTS. THE CONTACT IMMEDIATELY TURNED THE ENGINE OFF AND EXITED THE VEHICLE. WITHIN SECONDS, FLAMES APPEARED UNDER THE HOOD. THE FIRE DEPARTMENT WAS CALLED AND EXTINGUISHED THE FIRE. A FIRE REPORT AND A POLICE REPORT WERE FILED. THE CONTACT STATED THAT THE FIRE SPREAD AND DAMAGED THE PLASTIC TAIL LIGHT COVER AND PAINT OF ANOTHER VEHICLE PARKED IN THE DRIVEWAY. THE FIRE DEPARTMENT DETERMINED THAT THERE WAS AN ELECTRICAL FAILURE NEAR THE MOTOR. THE VEHICLE WAS DRIVEN FROM THE SCENE. THERE WERE NO INJURIES. AN UNKNOWN DEALER STATED THAT PARTS WERE UNAVAILABLE TO REPAIR THE VEHICLE PER NHTSA CAMPAIGN NUMBER: 17V676000 (ELECTRICAL SYSTEM:WIRING). THE VIN WAS NOT AVAILABLE. THE FAILURE MILEAGE WAS 100,000.

NHTSA ID
11089563
Incident
Apr 20, 2018
Mileage
100,000 mi
Engine
Filed Mar 21, 2018

VERY LOUD NOISE (FAN NOISE) COMING FROM THE ENGINE COMPARTMENT WHEN THE CAR WAS STARTED FROM A COLD START. CAR IS DRIVE-ABLE BUT SEEMED TO LOSE SOME POWER. THE NOISE MAY OR MAY NOT COME BACK DURING THE NEXT START. A FEW SIMPLE SEARCHES ON GOOGLE AND FROM VARIOUS BMW FORUMS INDICATED THAT IT'S A VERY COMMON PROBLEM FOR THE 2006 BMW 330I E90 SEDANS AND PROBLEM SEEM TO BE THE FAULTY WATER PUMP AND FAULTY THERMOSTAT. AS THERE ARE NO WARNING LIGHT NOR ANY TELL SIGNS, THE CAR COULD GO FROM FULL PERFORMANCE ON THE FREEWAY TO LIMP MODE (FORCEFUL SLOW-DOWN MODE) IN THE MATTER OF A FEW SECONDS DUE TO OVERHEATING OF THE WATER PUMP, AND IT COULD BE VERY DANGEROUS. THE HIDDEN ERROR CODES MAY BE DISCOVERED WITH A VEHICLE SPECIFIC SCANNING TOOL BUT THERE IS NO WARNING LIGHT OR ERROR LIGHT WHATSOEVER TO WARN THE OWNER UNLESS THE CAR IS BROUGHT IN TO THE SHOP AND BEING SCANNED WITH THE PROPER SCANNING TOOL. BUT IF THERE IS NO WARNING/ERROR LIGHT, NO ONE WOULD HAVE THOUGHT TO BRING THE CAR IN FOR SCANNING.

NHTSA ID
11080738
Incident
Mar 5, 2018
Mileage
63,000 mi
Engine
Filed Jan 25, 2018
Fire reported

TL* THE CONTACT OWNS A 2006 BMW 330I. TWO MINUTES AFTER THE VEHICLE WAS STARTED, THE CONTACT NOTICED AN ABNORMAL ODOR AND SMOKE UNDER THE HOOD. ALSO, THE INSIDE OF THE VEHICLE BECAME EXTREMELY WARM. THE VEHICLE WAS NOT TAKEN TO BE DIAGNOSED BY A DEALER. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE WATER PUMP NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE VEHICLE WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 17V676000 (ENGINE AND ENGINE COOLING). THE MANUFACTURER WAS NOT CONTACTED. THE APPROXIMATE FAILURE MILEAGE WAS 90,000. * (RECALL RELATED INCIDENT) TS

NHTSA ID
11064817
Incident
Oct 2, 2017
Mileage
90,000 mi
Engine
Filed Sep 22, 2017

BMW 3 SERIES MODELS 330I AND 325I YEAR 2006/2007 HAVE A PROBLEM WITH VALVE COVER AND HEAD BOLTS BREAKING OFF (BOLTS ARE MADE OF ALUMINUM), IN MY PERSONAL CASE, I WAS INSPECT MY CAR WHEN I WAS PARKED AND I FOUND A HEAD BOLT CLOSE TO THE OIL FILTER HOUSING BROKE OFF AND ALSO FOUND THE HEAD OF THE BOLT ON THE ENGINE BAY, CLOSE TO THE HOLE WHERE THE OIL IS BEING LEAKING. THE LEAK IS BAD AND I HAVE TO FILL IT UP EVERY WEEK. SOME OTHER PEOPLE HAVE HAD VALVE COVER BOLTS BROKEN OFF AND OIL LEAKING ON THE EXHAUST WICH COULD CAUSE FIRE AND ACCIDENTS. SEEMS LIKE THIS WAS A FACTORY DEFECT OVER TORQUING THE BOLTS OR LOW QUALITY ALUMINUM BOLTS. BMW SHOULD FIX THIS PROBLEM WITH ALL THIS MODELS AND YEARS. I HAVE READ ONLINE OF SEVERAL PEOPLE DEALING WITH THIS PROBLEM AN EVEN PAYING BMW DEALERS LOTS OF MONEY WHEN THE PROBLEM BEGUN AT THE MANUFACTURING PLANT. SERIOUS ENGINE DAMAGED CAN OCCUR TOO IF OTHER BOLTS INSIDE THE VALVE COVER BREAK AND MESS OTHERS COMPONENTS UP INSIDE THE ENGINE. OTHER NEWER MODELS DON'T HAVE THIS PROBLEM AFTER THE BOLTS BEING UPGRADE TO A BETTER QUALITY ALUMINUM OR CHANGE THE TORQUE VALUE ON THEM. THANKS SO MUCH FOR RESEARCHING AND YOUR TIME.

NHTSA ID
11025095
Incident
Jun 2, 2017
Engine
Filed Aug 15, 2017

WHILE DOING A VALVE COVER REPLACEMENT FOR BROKEN ALUMINIUM BOLTS, WHICH CAUSED A LEAK, DISCOVERED THAT THE THREE ALUMINIUM HEAD BOLTS ARE ALSO BROKEN. THE FOURTH OF THESE WAS FOUND TO BE BROKEN AND REPLACED. THIS KNOWN PROBLEM ON THIS MOTOR, THE N52 SIX CYLINDER 3.0 LITER MOTOR, CAUSED BY INADEQUATE BOLTS INSTALLED AT THE FACTORY. BMW UPDATED THE BOLTS AND TORQUE SPECS FOR THE MOTOR, BUT HAS NEVER FORMALLY (AT LEAST PUBLICLY) RECOGNIZED THE ISSUE. LOOKING ON MESSAGE BOARDS THIS IS A COMMON PROBLEM OCCURRING WITH THESE CARS THAT IS CAUSED BY A MANUFACTURING DEFECT RATHER THAN SIMPLY TIME AND AGE. THERE ARE MANY REPORTS OF THESE BOLTS BEING FOUND BROKEN AT 35 - 50K MILES.

NHTSA ID
11015356
Incident
Aug 6, 2017
Mileage
101,000 mi
Engine
Filed Jan 26, 2015

BROKEN CYLINDER HEAD BOLT NEAR OIL FILTER HOSING FOUND THIS TO BE A VERY VERY COMMON PROBLEM WITH (N52) ENGINES. *TR

NHTSA ID
10679023
Incident
Jan 26, 2015
Mileage
117,000 mi
Engine
Filed Jan 13, 2015

ONE OF MY VALVE COVER BOLTS BROKE CAUSING THE OIL TO LEAK EVERYWHERE. *TR

NHTSA ID
10672040
Incident
Sep 29, 2013
Mileage
1,800,000 mi
Engine
Filed Oct 8, 2014

ENGINE VALVE COVER HEAD BOLTS SNAPPED. QTY. 3. *TR

NHTSA ID
10643407
Incident
Oct 8, 2014
Mileage
160,000 mi
Engine
Filed Oct 2, 2014

A BOLT BROKE ON THE VALVE COVER. IT'S NOT FROM COLD WEATHER OR LACK OF MAINTENANCE, IT'S CLEARLY A MANUFACTURER DEFAULT. WHEN ADVISED BY VALLEY BMW IN MODESTO I LEARNED THIS HAPPENS IN MOST OF THESE MODELS THAT YEAR. IT'S FROM OVER TORQUING THE BOLT OR A FAULTY BOLT OR SOMETHING ELSE BUT IT'S CLEARLY NOT THE FAULT OF THE CONSUMER. MINE BROKE ON THE PASSENGER SIDE AND IT CAUSES THE OIL TO LEAK ON THE EXHAUST. THIS IS A SAFETY ISSUE AND MUST BE ADDRESSED IMMEDIATELY. THIS ALSO HAPPENS ON THE OIL PAN! HTTP://MSAUCEDA1.BLOGSPOT.COM/2013/07/BMW-330I-2006-BROKEN-BOLTS-VALVE-COVER.HTML IT COSTS OVER $1000 TO FIX AND AFTER RESEARCHING FURTHER, I FOUND THIS IS HAPPENING A LOT AND MANY CONSUMERS AS WELL AS REPAIR SERVICES ARE FRUSTRATED AND UNDERSTANDABLY ANGRY. PLEASE ADDRESS THIS AND MAKE BMW RECALL THESE VEHICLES FOR REPAIR BEFORE SOMEONE GETS KILLED! HTTPS://WWW.YOUTUBE.COM/WATCH?V=5CO92U-WA94. *TR

NHTSA ID
10640895
Incident
Sep 26, 2014
Mileage
126,313 mi
Engine
Filed Sep 4, 2014

TL* THE CONTACT OWNS A 2006 BMW 330I. THE CONTACT STATED THAT FUEL WAS LEAKING FROM THE OIL FILTER HOUSING. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC. THE TECHNICIAN DIAGNOSED THAT THE BALL COVER GASKET NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 87,243.

NHTSA ID
10630738
Incident
Sep 2, 2014
Mileage
87,243 mi
AirbagsEngine
Filed Aug 20, 2014

TL* THE CONTACT OWNS A 2006 BMW 330I. THE CONTACT STATED THE PASSENGER AIR BAG SENSOR ILLUMINATED ON THE INSTRUMENT PANEL. THE CONTACT MENTIONED THAT THE FAILURE PERSISTED EVEN WHEN THE SEAT WAS NOT OCCUPIED. THE DEALER STATED THE FRONT PASSENGER SEAT OCCUPANT SENSOR NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE FAILURE MILEAGE WAS 70,000. UPDATED 10/29/14*LJ UPDATED 4/23/15 *JS

NHTSA ID
10626671
Incident
Nov 1, 2013
Mileage
70,000 mi
Engine
Filed Apr 17, 2014

BMW NA HAS ISSUED A RECALL TO ADDRESS BROKEN HEAD BOLTS IN A NUMBER OF 2010 MODELS, WHICH CAN RESULT IN ENGINE FAILURE. I HAVE SPOKEN WITH SEVERAL BMW OWNERS AND FOUND THAT THIS ISSUE EXTENDS BEYOND THEIR INITIAL RECALL INTO EARLIER MODELS, BUT BMW NA IS IGNORING THE ISSUE OUTRIGHT IN THE HOPES THAT IT WILL DISAPPEAR. I HAVE SPOKEN WITH BMW NA SEVERAL TIMES AND THEY HAVE GIVEN ME THE RUNAROUND FOR SEVERAL MONTHS AND PUT MAJOR SMOKESCREENS UP IN MY ATTEMPT FURTHER THE CONVERSATION/INVESTIGATION OF THE ISSUE. I'M REACHING OUT TO NHTSA BECAUSE I HAVE NO OTHER RECOURSE AND I KNOW THIS ISSUE IS NOT A LOCALIZED ISSUE WITH ONE YEAR MODEL, BUT SYMPTOMATIC OF SEVERAL YEARS AND MODELS. PLEASE HELP THE DRIVING PUBLIC BY ASSISTING ME IN ADDRESSING THIS ISSUE WITH BMW.

NHTSA ID
10583282
Incident
Feb 3, 2014
Mileage
73,000 mi
Engine
Filed Dec 9, 2013

MY 2006 BMW 330I BEGAN LEAKING OIL. AFTER INSPECTION IT WAS DETERMINED TO BE BROKEN BOLTS. THIS VEHICLE HAS BEEN PROPERLY CARED FOR. IT HAS NOT BEEN IN AN ACCIDENT AND HAS BEEN SERVICED AND MAINTAINED. AFTER ONLINE REVIEW, THIS PROBLEM HAS HAPPENED TO SEVERAL BMWS. THE OIL LEAKS ONTO BRAKES, BELTS, EXHAUST, ETC.... CAUSING A SEVERE SAFETY HAZARD. THIS NEEDS TO BE ELEVATED TO A RECALL. *TR

NHTSA ID
10555313
Incident
Jun 1, 2013
Mileage
98,000 mi
Engine
Filed Jun 7, 2011

THE CYLINDER BOLT BROKE AND BMW IS REFUSING TO REPAIR THE BROKEN BOLT UNDER AN ACTIVE WARRANTY. BMW IS AWARE THAT THE CYLINDER BOLD ON THESE MODELS HAS BEEN KNOWN TO FAIL AND IS NOW BEING MADE OUT OF A DIFFERENT MATERIAL IN NEWER MODELS. I REQUESTED THAT BMW PAY FOR THE COST OF THIS REPAIR BECAUSE WE ARE AWARE OF IT BEING AND ISSUE AND THEY REFUSED TO DO SO UNDER AN ACTIVE EXTENDED COVERAGE WARRANTY. IT IS A PART THAT SHOULD BE ON RECALL FOR MODELS USING THIS PARTICULAR ALUMINUM CYLINDER BOLT. I AM VERY FRUSTRATED TO HAVE PAID $4,000+ FOR AN EXTENDED WARRANTY THAT DOES NOT COVER A $4,260.50 REPAIR. PETER PAN BMW HAS BEEN VERY HELPFUL BUT BMW OF NORTH AMERICA AND ASSURANT WHO AUTHORIZES REPAIRS HAS BEEN UNRESPONSIVE AND DENIED REPAIR.

NHTSA ID
10406382
Incident
Jun 7, 2011
Mileage
97,793 mi

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.

Other components reported on this vehicle

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Elsewhere on this vehicle

Data sources

Data on this page last refreshed .